"We were all caught off guard," publicist J.R. Savet told The Hollywood Reporter. "And then someone screamed and people jumped out of their chairs and started moving quickly to the swimming pool area. It was pretty scary."

A spokesperson for Oraxy has apologised for the stunt, adding that it was coordinated with maritime authorities: "It wasn't meant to frighten people."

Oraxy are said to be planning further stunts during Cannes. However, the spokesperson noted that they "will be something more sporty".